#endif
Lib_sys.h
#ifndef LIB_SYS_H #define LIB_SYS_H
#include\#include\
class lib_sys{ private:
int book_tot; int student_tot;
book lbook[100];
student lstudent[100];
char username[50]; char password[50];
int user_state; //0 is no user , 1 is login
public:
lib_sys(){
username[0]='\\0'; password[0]='\\0'; user_state=0; book_tot=0; student_tot=0; }
int input_data(); int output_data();
int user_login();
int check_user_right(); int check_admin_right();
book edit_book_inner(book k); book add_book_inner();
int show_book_inner(book k); int find_book_inner(char *isbn);
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int find_student_inner(char *username);
int add_book();
int edit_book(char *isbn);
int del_book(char *isbn,int much); int show_book();
int borrow_book(); int return_book();
int register_user(); char * get_username(){ return username; }
int show_user_detail(); };
#endif
Lib_sys.cpp
#include\
#include
#include
int lib_sys::input_data(){ int i,j;
fstream fbook,fstudent;
fbook.open(\
fstudent.open(\ if (!fbook) return 0; if (!fstudent) return 0;
fbook >> book_tot; fbook.ignore();
for (i=1;i<=book_tot;i++){
fbook.getline(lbook[i].isbn,50);
fbook.getline(lbook[i].bookTitle,50);
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fbook.getline(lbook[i].author,50); fbook.getline(lbook[i].publisher,50); fbook.getline(lbook[i].datepublished,50); fbook >> lbook[i].left; fbook.ignore(); }
fbook.close();
fstudent >> student_tot; fstudent.ignore();
for (i=1;i<=student_tot;i++){
fstudent.getline(lstudent[i].username,50); fstudent.getline(lstudent[i].password,50); fstudent >> lstudent[i].num; fstudent.ignore();
for (j=1;j<=lstudent[i].num;j++)
fstudent.getline(lstudent[i].isbn[j],50); }
fstudent.close();
return 1; }
int lib_sys::output_data(){ int i,j;
fstream fbook,fstudent;
fbook.open(\
fstudent.open(\ if (!fbook) return 0; if (!fstudent) return 0;
fbook << book_tot << endl; for (i=1;i<=book_tot;i++){
fbook << lbook[i].isbn << endl;
fbook << lbook[i].bookTitle << endl; fbook << lbook[i].author << endl; fbook << lbook[i].publisher << endl; fbook << lbook[i].datepublished << endl; fbook << lbook[i].left << endl; }
fbook.close();
fstudent << student_tot << endl; for (i=1;i<=student_tot;i++){
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fstudent << lstudent[i].username << endl; fstudent << lstudent[i].password << endl; fstudent << lstudent[i].num << endl; for (j=1;j<=lstudent[i].num;j++)
fstudent << lstudent[i].isbn[j] << endl; }
fstudent.close();
return 1; }
int lib_sys::user_login(){ char ua[50],pw[50]; int i;
cout << \ cin.getline(ua,50); cout << \ cin.getline(pw,50);
for (i=1;i<=student_tot;i++){
//cout << lstudent[i].username << endl << lstudent[i].password << endl; if (strcmp(lstudent[i].username,ua)==0 && strcmp(lstudent[i].password,pw)==0){ user_state=1;
strcpy(username,ua); strcpy(password,pw);
//cout << username << endl; //cout << password << endl; break; } }
if (user_state) cout << \ else cout << \ return user_state; }
int lib_sys::check_user_right(){ return user_state; }
int lib_sys::check_admin_right(){ if (!user_state) return 0;
if (strcmp(username,\ return 0;
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}
book lib_sys::edit_book_inner(book k){ char ch; char st[50];
if (!check_admin_right()) return k; ch='0';
while (!(ch=='6')){ system(\
cout << \请输入要修改的项目，在新数据输入状态下直接回车表示取消修改\\n\ cout << \ cout << \书名\\n\ cout << \作者\\n\ cout << \出版社\\n\ cout << \出版时间\\n\ cout << \确定\\n\ cout.flush(); ch=getch(); switch (ch){ case '1':
cout << \当前的isbn是： \ cout << \请输入新数据： \ cin.getline(st,50);
if (!strlen(st)==0) strcpy(k.isbn,st); break; case '2':
cout << \当前的书名是： \ cout << \请输入新数据： \ cin.getline(st,50);
if (!strlen(st)==0) strcpy(k.bookTitle,st); break; case '3':
cout << \当前的作者是： \ cout << \请输入新数据： \ cin.getline(st,50);
if (!strlen(st)==0) strcpy(k.author,st); break; case '4':
cout << \当前的出版社是： \ cout << \请输入新数据： \ cin.getline(st,50);
if (!strlen(st)==0) strcpy(k.publisher,st); break; case '5':
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